Ten volunteers, A to J, are available for a survey. A spreadsheet generates two-digit random integers from 00 to 99, with every integer equally likely.
Describe a method that uses 00 to 89 to select one volunteer and rejects 90 to 99.
Explain why your method gives every volunteer the same eventual probability of selection.
36 exam-style questions on OCR A Level Maths 2.1 Statistical Sampling, covering 2.1.1 Population and sample, 2.1.2 Informal inferences from samples, 2.1.3 Sampling techniques, 2.1.4 Selecting or critiquing sampling techniques, and 2.1 Statistical Sampling. Each one has a worked solution and a mark scheme showing where the marks go.